Disclosed are an active matrix-based electronic apparatus and a method of driving the same. More particularly, a pixel circuit of an electronic apparatus according to an embodiment of the present disclosure may include a light-emitting driver configured to apply a forward bias to a light-emitting device in an emission mode to control light to be emitted through the light-emitting device; a sensing driver configured to apply a non-forward bias to the light-emitting device in a sensing mode to control an electrical signal corresponding to light incident on the light-emitting device to be generated; and a reader configured to read intensity of light corresponding to the generated electrical signal.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A pixel circuit of an electronic apparatus, the pixel circuit comprising: a light-emitting driver configured to apply a forward bias to a light-emitting device in an emission mode to control light to be emitted through the light-emitting device; a sensing driver configured to apply a non-forward bias to the light-emitting device in a sensing mode to control an electrical signal corresponding to light incident on the light-emitting device to be generated; and a reader configured to read intensity of light corresponding to the generated electrical signal, wherein the reader comprises a source follower transistor, a fifth transistor, connected to a cathode of the light-emitting device through a gate terminal, and a sixth transistor provided between the fifth transistor and a read line.
2. The pixel circuit according to claim 1 , wherein the light-emitting driver comprises a first transistor provided between a data line and a power source voltage line; and a second transistor connected to a drain terminal of the first transistor through a gate terminal and provided between the power source voltage line and an anode of the light-emitting device.
3. The pixel circuit according to claim 2 , wherein the light-emitting driver further comprises a capacitor provided between the drain terminal of the first transistor and the power source voltage line.
4. The pixel circuit according to claim 2 , wherein the sensing driver comprises a third transistor provided between a cathode of the light-emitting device and a ground voltage line; a fourth transistor provided between the ground voltage line and an anode of the light-emitting device; and a seventh transistor provided between the power source voltage line and the cathode of the light-emitting device.
5. The pixel circuit according to claim 2 , wherein the sensing driver comprises a third transistor provided between a cathode of the light-emitting device and a first ground voltage line; and a fourth transistor provided between an anode of the light-emitting device and a second ground voltage line.
6. The pixel circuit according to claim 5 , wherein the first ground voltage line is applied with a first ground voltage that has a higher level than that of a second ground voltage applied through the second ground voltage line.
7. The pixel circuit according to claim 1 , wherein the sensing driver applies the non-forward bias to the light-emitting device to control the electrical signal corresponding to light emitted from an adjacent pixel to be generated.
8. A pixel circuit of an electronic apparatus, the pixel circuit comprising: a light-emitting driver configured to apply a forward bias to a light-emitting device in an emission mode to control light to be emitted through the light-emitting device; a sensing driver configured to apply a non-forward bias to the light-emitting device in a sensing mode to control an electrical signal corresponding to light incident on the light-emitting device to be generated; and a reader configured to read intensity of light corresponding to the generated electrical signal, wherein the light-emitting driver comprises a first transistor provided between a data line and a ground voltage line; and a second transistor connected to a source terminal of the first transistor through a gate terminal and provided between a cathode of the light-emitting device, which is connected to a power source voltage line through an anode, and the ground voltage line, wherein the sensing driver comprises a third transistor provided between the cathode of the light-emitting device and the ground voltage line.
9. The pixel circuit according to claim 8 , wherein the light-emitting driver further comprises a capacitor provided between the source terminal of the first transistor and the ground voltage line.
10. The pixel circuit according to claim 8 , wherein the ground voltage line is applied with a second power source voltage that has a higher level than that of a first power source voltage applied to the power source voltage line, for a preset time section in the sensing mode.
11. A method of driving a pixel circuit of an electronic apparatus, the method comprising: applying, by a light-emitting driver, a forward bias to a light-emitting device in an emission mode to control light to be emitted through the light-emitting device; applying, by a sensing driver, a non-forward bias to the light-emitting device in a sensing mode to control an electrical signal corresponding to light incident on the light-emitting device to be generated; and reading, by a reader, intensity of light corresponding to the generated electrical signal, wherein the reader comprises a source follower transistor, a fifth transistor, connected to a cathode of the light-emitting device through a gate terminal, and a sixth transistor provided between the fifth transistor and a read line.
12. The method according to claim 11 , in the applying of the non-forward bias, the non-forward bias is applied to the light-emitting device to control the electrical signal, which corresponds to light emitted from an adjacent pixel, to be generated.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
February 26, 2020
August 3, 2021
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